2.
Eyes on the Earth 3D [NASA_JPL_EYES]
Monitor our planet's vital signs, such as sea level height, atmospheric carbon dioxide concentration and Antarctic ozone. Trace the movement of water around the globe using the gravity map from NASA's ...

4.
Power and Emissions Thematic Mapper [EPA_egrid]
The Power and Emissions Thematic Mapper is a tool for visualizing power generation and emissions data by state and year on a Google Earth map. The data is from the Emissions & Generation Resource ...